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HLS で、playlist から削除したセグメントをどれくらいの期間残すべきかを公式から和訳した

Posted at

Apple のドキュメント

   When the server removes a Media Segment URI from the Playlist, the
   corresponding Media Segment MUST remain available to clients for a
   period of time equal to the duration of the segment plus the duration
   of the longest Playlist file distributed by the server containing
   that segment.  Removing a Media Segment earlier than that can
   interrupt in-progress playback.

↓↓↓和訳↓↓↓

セグメントの URI を playlist から削除した場合、該当するセグメントは、そのセグメントの duration + 
そのセグメントを含んでいた playlist のうち最長の duration 分は、クライアントが利用できるように残しておく必要がある。
それより早く削除してしまうと、視聴するセグメントの順番が割り込んでしまうかもしれない。
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